package com.example.librarymanagement.security;

import cn.hutool.json.JSONUtil;
import com.example.librarymanagement.exception.CaptchaException;
import com.example.librarymanagement.result.IResultCode;
import com.example.librarymanagement.result.Result;
import com.example.librarymanagement.result.ResultCode;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

/**
 * @author fgba
 */
@Component
public class LoginFailureHandler implements AuthenticationFailureHandler {
    @Override
    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException e) throws IOException, ServletException {
        response.setContentType("application/json;charset=UTF-8");
        ServletOutputStream outputStream = response.getOutputStream();
        Result result = null;
        if (e instanceof CaptchaException) {
            IResultCode resultCode = ((CaptchaException) e).getResultCode();
            result = Result.error(resultCode.getCode(), resultCode.getMsg(), null);
        } else {
            result = Result.error(ResultCode.USERNAME_OR_PASSWORD_ERROR.getCode(), ResultCode.USERNAME_OR_PASSWORD_ERROR.getMsg(), null);
        }
        outputStream.write(JSONUtil.toJsonStr(result).getBytes(StandardCharsets.UTF_8));
        outputStream.flush();
        outputStream.close();
    }
}
